Title:
MAGNETISM DETECTOR AND MOBILE BODY DETECTOR
Document Type and Number:
Japanese Patent JP2020085573
Kind Code:
A
Abstract:
To provide a magnetism detector and a mobile body detector which can be reduced in size and in cost as compared with an existing magnetism detector and an existing mobile body detector.SOLUTION: A magnetism detector 10 includes: a coil 12; a signal generator 18b for applying an alternation voltage for generating an alternation magnetic field in the coil 12; a GMR element bridge circuit made of GMR elements 15a to 15d, to which a magnetic field that generates the coil 12 is applied. The alternation voltage output from the signal generator 18b is supplied as an operational voltage to the GMR element bridge circuit. The output voltage of the GMR element bridge circuit is amplified by a differential amplifier 17 and is passed through a low-pass filter 18a.SELECTED DRAWING: Figure 6
Inventors:
TANABE KEI
UNNO AKIHIRO
UNNO AKIHIRO
Application Number:
JP2018217790A
Publication Date:
June 04, 2020
Filing Date:
November 20, 2018
Export Citation:
Assignee:
TDK CORP
International Classes:
G01D5/245; G01D5/12
Domestic Patent References:
| JP2003315094A | 2003-11-06 | |||
| JP2018146303A | 2018-09-20 | |||
| JP2018169296A | 2018-11-01 | |||
| JP2010266247A | 2010-11-25 |
Foreign References:
| WO2017073280A1 | 2017-05-04 |
Attorney, Agent or Firm:
Takashi Murai
Hiromi Murai
Hiromi Murai